jim sciutto is joining us with that side of the story. so, in your mind, does the u.s. have any more plans other than just talking loudly at this point? >> well, that's a good question. in those words, there's a lot of meaning. officials delivering very stark warnings to the russians to be careful not to move in. you heard secretary of state john kerry saying yesterday it would be, in his words, a grave mistake in the russians move in. now you have defense secretary chuck hagel who is traveling saying that russia should not make any moves that could easily be misinterpreted. we know they are watching closely. i think we can assume that they are working very much behind the scenes to deliver that message as well. and that shows that they are concerned. what else can they do beyond those concerns, it's a fair question. we don't know. it's hard to say what else they can do. >> what is the biggest concern? >> the biggest concern is that russia moves in. we've seen this story before. you remember in 2008 when russian troops moved in to georgia, as it happens around the time